EP3096423B1 - Isolating gripper - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION

• in einem Schneidhub der Abisolierzange die Ummantelung in dem Endbereich zumindest teilweise einschneiden,
• dann in einem Abreißhub den zuvor zumindest teilweise abgetrennten hülsenartigen Teilbereich der Isolierung "abreißen" und
• in einem Abziehhub den hülsenartigen Teilbereich der Isolierung von dem elektrischen Leiter abziehen.

In electrical cables, an electrical conductor, which are formed in particular with a plurality of strands, for electrical insulation from the environment with an insulating sheath, in particular an insulation made of plastic, provided. For the electrical connection of the cable to plug or any other electrical components, a particular sleeve-like portion of the insulation in an end region of the cable must be eliminated. For this purpose, use wire strippers, which

• in a cutting stroke of the wire stripper, at least partially cut the sheath in the end region,
• then in a Abreißhub the previously at least partially separated sleeve-like portion of the insulation "tear off" and
• remove the sleeve-like portion of the insulation from the electrical conductor in a Abziehhub.

STATE OF THE ART

The publication DE 37 33 358 C1 discloses a wire stripper in which a receptacle for a cable is formed in the region of a forceps jaw of two forceps jaws. When the hand lever is closed, the jaws are initially closed. On the inside of the jaws on both sides of the cable knife holders are supported with stripping blades, which cut the sheathing of the cable with increasing closure of the jaws in a cutting stroke. Are the jaws and thus the stripping closed to an adjustable extent, for which a cutting of the insulation is done, a closed position of the stripping is achieved and terminated the cutting stroke. On the cutting stroke then follows a Abreißhub, in which the stripping knives together in parallel to the longitudinal axis the recording and thus the cable are pulled, resulting in a tearing of the sleeve-like portion of the insulation and the removal of the same from the electrical conductor. During this pull-down stroke, the knife holders, with the stripping blades held thereon, slide along the jaws, under the guidance of the jaws. This movement is caused by a pull rod on which the scissor-type pivotable knife holders are articulated in one end region. The other end of the tie rod is hinged approximately centrally on a control lever. An end portion of the control lever is hinged to a movable hand lever, while the other end portion of the control lever is guided via a roller on a control link, which is formed by the movable jaw. During the cutting stroke, the roller is in an end portion of the control link, whereby the control lever can cause the cutting stroke with the closing movement of the jaws and thus the stripping. For sufficiently large actuation forces at the end of the cutting stroke, the roller overcomes a force threshold predetermining increase of the control link. The roller then slides along the control link, which is associated with the operation of the drawbar and thus the Abreißhub and Abziehhub. At the end of the Abziehhubs the roller enters the region of an angling of the control link, whereby in an opening stroke, an open position of the movable jaw is brought about. With the opening movement of the movable jaw, the knife holders move with the stripping blades away from the cable. The length of the Abziehhubs is structurally determined by the distance of the increase of the control link from the bending of the control link. Here, the length of the Abziehhubs is determined by dimensioning the control link that it is sufficient to completely deduct the sleeve-like portion of the sheath of the electrical conductor. The wire stripper according to the document DE 37 33 358 C1 In addition, it has a separating device for severing a cable for the purpose of preparing the stripping operation, whereby the separating device is also actuated by actuating the hand lever. Furthermore, the wire stripper has an adjusting device by means of which the extent of the closing movement of the stripping blades during the Schneidteilhubs is adjustable. A corresponding wire stripper is sold by the applicant under the name "Scora 2", see. on the website www.wezag.de.

The publication EP 2 056 416 A2 discloses a wire stripper in which a fixed hand lever is rigidly connected to a jaw jaw disposed on the opposite side from a longitudinal axis of the wire stripper. At this forceps jaw a movable hand lever is articulated. Furthermore, on the jaw and the fixed hand lever forming basic body hinged the other jaw in a pivot bearing. An actuation of this forceps jaw via a pressure lever. This pressure lever is articulated in an end region on the movable hand lever. In the other end region of the pressure lever carries a roller by means of which the pressure lever is supported on the pivotable about the pivot axis jaw. In the cutting stroke, the pivoting of the movable hand lever for applying a pivoting torque via the pressure lever leads to the movable jaw, whereby a closure of the forceps jaw and the cutting of the stripping knives is connected in the insulation of the cable. At the end of the cutting stroke, the pressure lever does not continue to displace the movable jaw. Rather, then rolls off the role of the pressure lever on the contact surface of the pliers jaw and actuated via a tie rod associated with a second role, the pull rod. The resulting displacement of the drawbar and the knife holder held thereon with stripping blades leads to a tear-off stroke and a draw-off stroke, for which the knife holders and stripping knives slide in the closing position of the stripping knives reached at the end of the cutting stroke, coaxially with the longitudinal axis of the cable along the jaws.

While it is generally possible for the sleeve-like severed portion of the insulation to be completely removed from the electrical conductor with the wire stripper, it may also be desirable for the sleeve-like portion in the pull-off stroke to be moved only a small distance away from the remaining insulation on the electrical conductor , In this state, the separated portion of the sheath protects the electrical conductor during storage or prior to making the desired electrical connection. If the electrical conductor is formed with a plurality of strands, the sleeve part, which is only partially drawn off, prevents the strands from being "spliced", which can make the subsequent production of the connection with a plug or other electrical component more difficult, and can also lead to breakage of individual strands. It may be desirable in this case that (for example, depending on the diameter of the cable, diameter and material of the electrical conductor and / or layer thickness and material of the insulation), the length of the partial removal of the sleeve-like portion of the insulation by the wire stripper, ie the length of Abziehteilhubs, can be adjusted individually. According to the document EP 2 056 416 A2 An adjustment of the length of the Abziehhubs done by means of a stop limiting the movement of the drawbar. For the structural design of the attack discloses the document EP 2 056 416 A2 different embodiments: For a first embodiment, the stop is a pivotable, L-shaped angled Lever formed, wherein an end face of a leg of the lever forms the stop for the drawbar. Thus, in the corresponding pivoted position of the lever, the length of the leg forming the stop for the drawbar precedes the end of the pull-down stroke. For another embodiment, it is proposed that the stop for the pull rod for specifying the end of Abziehhubs is predetermined by an attenuator in the fixed hand lever. For a further embodiment, a kind of flattened cam disc is used to form the stopper, wherein the cam disc is latched via a peripheral toothing in different angular positions for setting different length Abziehhübe. Furthermore, the document proposes EP 2 056 416 A2 the formation of the stop for the pull rod by a leaf spring, which gives the user of the wire stripper a haptic feedback upon reaching the end of Abziehhubs, which is determined by the leaf spring. For this embodiment, when the tie rod is applied to the leaf spring and when the hand forces applied to the wire stripper are increased while increasing the elastic loading of the leaf spring, it is also possible to enlarge the removal stroke.

From the not previously published utility model DE 20 2015 100 507.5 a wire stripper is known, which has a safety device which ensures a partially closed position or a fully closed position of the stripping. This is especially for the storage of the wire stripper advantageous because, for example, a craftsman in secured closed position of the stripping can not inadvertently reach into a pliers mouth of the wire stripper and can be injured on the stripping knives. On the other hand, when securing the closed position, the stripping blades are also protected against damage.

Further prior art is from the documents DE 42 05 194 C1 . DE 195 12 132 C1 . WO 2005/036707 A1 . DE 20 2004 018 133 U1 . DE 44 20 006 A1 known.

OBJECT OF THE INVENTION

The invention has for its object to provide a wire stripper, which is improved in terms of handling and / or reliability.

SOLUTION

The object of the invention is achieved with the features of the independent claim. Further preferred embodiments according to the invention can be found in the dependent claims.

DESCRIPTION OF THE INVENTION

• In einem Schneidhub erfolgt eine Schließbewegung mindestens eines Abisoliermessers quer zu einer Längsachse einer Aufnahme für ein abzuisolierendes Kabel. Mit Beendigung des Schneidhubs ist eine Schließstellung der Abisoliermesser erreicht, in welcher eine Isolierung eines in der Aufnahme angeordneten Kabels teilweise eingeschnitten ist. Somit ist in der Schließstellung ein hülsenartiger Teilbereich der Isolierung teilweise (vorzugsweise in mindestens einem Teilumfangsbereich) abgetrennt.
• Des Weiteren verfügt der Schließhub der Handhebel über einen Abreißhub. Während des Abreißhubs, in dem die Abisoliermesser vorzugsweise in der Schließstellung verbleiben oder diese nur unwesentlich verlassen, wird das mindestens eine Abisoliermesser in Richtung der Längsachse der Aufnahme für das abzuisolierende Kabel bewegt, bis ein Abreißen des hülsenartigen Teilbereichs der Isolierung erfolgt ist.
• Während eines Abziehhubs erfolgt (nach dem teilweisen Abtrennen in dem Schneidhub und dem Abreißen in dem Abreißhub) eine Bewegung des mindestens einen Abisoliermessers in Richtung der Längsachse der Aufnahme für das abzuisolierende Kabel, wobei vorzugsweise die Abisoliermesser in der Schließstellung verbleiben oder ihre Stellung nur unwesentlich gegenüber der Schließstellung verändern. Während des Abziehhub wird der zuvor abgerissene hülsenartige Teilbereich der Isolierung gleitend über den elektrischen Leiter bewegt, wobei hier ein vollständiges Abziehen des hülsenartigen Teilbereichs von dem elektrischen Leiter erfolgen kann oder lediglich ein Teilabzug.

The invention is based on an analysis of the force and movement conditions on a wire stripper. It has been found here that during the cutting stroke relatively large forces must be applied to the hand lever of the wire stripper in order to bring about the transfer of the stripping in the closed position and the cutting of the stripping in the insulation of the cable can. Also for the "tearing" of the partially separated sleeve-like portion of the insulation during the Abreißhubs relatively large forces are applied. After the tearing of the sleeve-like portion of the insulation, however, act relatively small forces during Abziehhubs because only the Gleitreibkräfte between the sleeve-like portion of the insulation and the electrical conductor must be overcome for the removal of the sleeve-like portion of the insulation. This drop in the required operating force for the hand lever of the wire stripper with the transition from Abreißhub to Abziehhub has the consequence that both the bringing about the Schneidhubs and the tearing of the sleeve-like portion of the insulation of the user of the wire stripper can be sensitively and controlled brought about. With the tearing off of the sleeve-like portion of the casing and the sudden drop in the closing of the hand lever counteracting Gleitreibkraft has a non-rapid adjustment of the hand forces in the form of a sudden reduction of the hand forces result in an uncontrolled sudden closing movement of the hand lever with concomitant rapid implementation of Abziehhubs. This is basically undesirable because the user of the wire stripper in this case has the impression of having less control over the machining process of the cable during the pull-off stroke. In the worst case, the user grasps the hand levers of the wire stripper such that fingertips of the hand are arranged between the hand levers. If it comes to the sudden rapid closing movement of the hand lever during the Abziehhubs, this can lead to a bouncing and pinching the fingertips of the hand between the hand levers. These problems are eliminated in the context of the invention as follows (at least in part):
The stripper according to the invention has two hand lever. The closing stroke of the hand lever is formed with three partial strokes:

• In a cutting stroke, a closing movement of at least one stripping blade takes place transversely to a longitudinal axis of a receptacle for a cable to be stripped. Upon completion of the cutting stroke, a closed position of the stripping blade is reached, in which an insulation of a cable arranged in the receptacle is partially cut. Thus, in the closed position, a sleeve-like portion of the insulation is partially isolated (preferably in at least a partial circumference area).
• Furthermore, the closing stroke of the hand lever has a tear-off stroke. During the tear-off stroke, in which the stripping knives preferably remain in the closed position or leave them only insignificantly, the at least one stripping blade is moved in the direction of the longitudinal axis of the receptacle for the cable to be stripped until tearing off of the sleeve-like portion of the insulation has taken place.
• During a Abziehhubs takes place (after the partial separation in the cutting stroke and the tearing in the Abreißhub) movement of the at least one Strisoliermessers in the direction of the longitudinal axis of the receptacle for the cable to be stripped, preferably the stripping blades remain in the closed position or their position only slightly opposite change the closed position. During the Abziehhub the previously torn off sleeve-like portion of the insulation is slidably moved over the electrical conductor, in which case a complete removal of the sleeve-like portion of the electrical conductor can be done or only a partial trigger.

According to the invention, the wire stripper is equipped with a spring and / or damping element. This spring and / or damping element comes only (exactly or approximately) with the transition from Abreißhub to Abziehhub to effect. Thus, the spring and / or damping element does not affect the force conditions on the wire stripper during the Schneidhubs and during the Abreißhubs, whereby the force ratios can be specified by the kinematics and other spring and / or damping elements of the wire stripper and the invention used spring and / or or damping element generates no additional forces, which overcome to carry out the cutting stroke and the Abreißhubs Need to become. On the other hand, if the spring and / or damping element comes into effect with the transition from the pull-down stroke to the pull-down stroke, this generates a spring and / or damping force during the pull-down stroke, which counteracts the closing of the hand lever. With this additionally acting during the Abziehhubs spring and / or damping force of the above-explained drop in the closing of the hand lever counteracting force can be at least partially compensated, which also the occurrence of the above-mentioned undesirable effects, in particular an abrupt closing movement of the hand lever after completion of Breakaway hubs, at least can be alleviated.

The fact that the spring and / or damping element only in a partial stroke, namely during the Abziehhubs, is effective, acting on the Schließhub nonlinear force component, which can be advantageously designed for handling and operating safety of the wire stripper.

The stripper according to the invention has a drive mechanism with a lever. The mechanical boundary conditions of the lever change during the transition from the cutting stroke to the Abreißhub. To name just a few non-limiting examples, such lever may be the control lever of the document DE 37 33 358 C1 act, the change in the mechanical boundary conditions in the transition from the cutting stroke to the Abreißhub in overcoming the force threshold predetermining increasing the control link through the role of the control lever with the subsequent movement along the control link. For embodiments accordingly EP 2 056 416 A2 the lever is designed as a pressure lever, wherein for this embodiment, the change of the mechanical boundary conditions of the lever consist in that during the Abreißhubes, but not during the Schneidhubs the role of the pressure lever along the actuating surface of the jaw roll rolls over the role of the tie rod and the drawbar Movement offset. According to the invention, the lever is arranged with a clearance to the spring and / or damping element during the cutting stroke and during the Abreißhubs. As a result of this game affects the spring and / or damping element during the cutting stroke and the Abreißhubs not the force conditions on the wire stripper. With the transition from Abreißhub to Abziehhub the game is eliminated, which then during the next Abziehhubs the spring and / or damping element can act on the lever for generating a closure of the hand lever opposing spring and / or damping force.

According to the invention, the spring and / or damping element is held on the movable hand lever.

By means of the action of the spring and / or damping element on a lever, the design options for the characteristic of the spring and / or damping force can be extended during the Abziehhubs. For example, the lever can change its angular position during the removal stroke, whereby different force changes to the spring and / or damping element can be generated depending on the angle.

In order to allow constructive that the spring and / or damping element only comes into effect with the transition from the Abreißhub to Abziehhub, there are many possibilities. To name just a few non-limiting examples, the coupling of the spring and / or damping element can be done via a slot, the slot can also specify the game and with the transition from Abreißhub to Abziehhub the limitation of the slot is reached. It is also possible that the spring and / or damping element forms a sliding contact with an adjacent component with the transition from Abreißhub to Abziehhub. For a particular proposal of the invention, the lever has a rotatable roller. The rotatable roller interacts with the transition from Abreißhub to Abziehhub with the spring and / or damping element, in which case during the Abziehhubs the roller can roll on the spring and / or damping element. As a result, undesirable friction effects can be at least reduced.

In a further embodiment of the wire stripper according to the invention, the lever has a roller on each side. The two rollers then have a common axis of rotation. The rollers interact with the transition from Abreißhub to Abziehhub with the spring and / or damping element in each case. For this embodiment, the distribution of the generated spring and / or damping force takes place on two contact surfaces, which is in each case formed between a roller and the spring and / or damping element. This can u. U. despite the use of two rollers a one-piece, both rollers contacting spring and / or damping element can be used. But it is also possible that two partial spring and / or damping elements are used, which each form a contact with an associated role.

If the stripping pliers are used for stripping different cables, in particular cables of different diameters of the electrical conductor and / or different layer thicknesses of the insulation, the transition from the pull-off stroke to the pull-off stroke may occur in different closing positions of the stripping pliers. For example, to strip a small diameter cable, you must first use a large portion of the closing stroke of the hand lever to close the stripping blades so that they will contact the outer surface of the cable before the cutting stroke begins. In this case, the transition from Abreißhub to Abziehhub is only at the end of the closing stroke of the hand lever. By contrast, for the stripping of a cable with a larger diameter, the transition from Abreißhub to Abziehhub already after passing through a smaller Teilhubs the Schließhubs the hand lever. It is possible that the design of the wire stripper is such that the spring and / or damping element comes exactly to the effect when the transition from the Abreißhub Abziehhub is reached for the largest cable to be stripped. This is accepted that for smaller cables, the spring and / or damping element comes a little too early, so even during the Abreißhubs (or even during the Schneidhubs) to effect. It is also possible that an interpretation of the wire stripper is done so that an optimum result is achieved for all stripping with the wire stripper diameters of cables, including, for example. A design is such that for a medium diameter to be stripped the spring and / or damping element for Effect comes when the transition from Abreißhub to Abziehhub is reached.

The handling of the stripper according to the invention can be improved if the game between the spring and / or damping element and the lever is adjustable, so that the adjustment of this game the diameter of the stripped cable can be taken into account, so that the spring and / or damping element comes into effect exactly when the transition from Abreißhub to Abziehhub is reached. For the adjustability of the game between the spring and / or damping element and the lever there are many possibilities. To name only a few non-limiting examples, the adjustment of the play between the spring and / or damping element and the lever can be effected by changing a position of the axis of rotation of the at least one roller of the lever. For example, the roller may be mounted via a bolt relative to the main body of the lever, wherein the bolt is insertable into different bores of the lever or may be formed as an eccentric bolt, with the rotation of which a displacement of the axis of rotation of the roller takes place. For another embodiment, the setting of the Game by changing the position of the spring and / or damping element. It is possible here that an adjustment of the game in stages, which correlate with different diameters of the cable, or continuously.

There are many possibilities for the design of the spring and / or damping element. Thus, for example, the spring and / or damping element as wound spring, leg spring u. Ä. Be formed to name but a few non-limiting examples. For a particular proposal of the invention, the spring and / or damping element is formed with an elastomeric body, for example. A polyurethane body.

Another embodiment of the invention is devoted to the structural design and integration of the spring and / or damping element in the wire stripper. For this proposal of the invention, the spring and / or damping element is inserted into a hand lever, without necessarily an additional backup of the spring and / or damping element in the hand lever by a press fit, a cohesive connection, a screw u. Ä. Is required. Rather, the backup of the spring and / or damping element takes place in the hand lever by a cover with the hand lever is mounted after insertion thereof in the hand lever, which blocks the removal of the spring and / or damping element from the hand lever. This cover is part of a storage device formed in the region of the hand lever, which serves to store at least one accessory of the wire stripper. With regard to further details for such a storage device formed in the region of the hand lever, reference is made to the non-prepublished European patent application with the file reference EP 14 177 831.6-1701 directed.

According to a further proposal of the invention, the spring and / or damping element is used multifunctional in the wire stripper: In this case, the wire stripper also has a separator for severing a cable, which is also operated via the hand lever. The spring and / or damping element is effective even in a final partial stroke for the severing of the cable by the separator. This refinement is based on the finding that when a cable is severed with a separating device, the contact surface or contact length of the blade of the separating knife first increases with the cable as the entry of a separating knife into the cable increases, until the contact length corresponds to the diameter of the cable. This is accompanied by an increase in the applied force on the hand lever. In the second half of severing the cable then decreases again the contact length of the cutting blade with the cable, which at the end no longer the electrical conductor, but the easier to be cut through insulation must be cut. Thus, the force to be applied also falls here. With the spring and / or damping element, an increase in the separation speed and / or a reduction in the required actuation force can also be counteracted at the end of the separation process.

According to a design variant of the wire stripper according to the invention, the spring and / or damping element comes when stripping a cable with an outside diameter of 7.5 mm to effect after 30 to 50% of the closing stroke of the hand lever. It is also possible that the spring and / or damping element at an outer diameter of the cable from 3.5 mm to 40% to 60% of the closing stroke of the hand lever comes into effect. Alternatively or cumulatively, it is possible that with an outside diameter of 1.3 mm of the cable, the spring and / or damping element comes into effect after 50% to 65% of the closing stroke of the hand lever. The above-mentioned outer diameters are the nominal diameters, whereby it is also possible that the outer diameter deviates from the specified outer diameters by +/- 0.5 mm or +/- 0.2 mm.

Advantageous developments of the invention will become apparent from the claims, the description and the drawings. The advantages of features and of combinations of several features mentioned in the description are merely exemplary and can take effect alternatively or cumulatively, without the advantages having to be achieved by embodiments according to the invention. Without thereby altering the subject matter of the appended claims, as regards the disclosure of the original application documents and the patent, further features can be found in the drawings, in particular the illustrated geometries and the relative dimensions of several components and their relative arrangement and operative connection. The combination of features of different embodiments of the invention or of features of different claims is also possible deviating from the chosen relationships of the claims and is hereby stimulated. This also applies to those features which are shown in separate drawings or are mentioned in their description. These features can also be combined with features of different claims. Likewise, in the claims listed features for further embodiments of the invention can be omitted.

The features mentioned in the patent claims and the description are to be understood in terms of their number that exactly this number or a greater number than the said number is present, without requiring an explicit use of the adverb "at least". For example, when talking about an element, it should be understood that there is exactly one element, two elements or more elements. These features may be supplemented by other features or be the only characteristics that make up the product in question.

The reference numerals contained in the claims do not limit the scope of the objects protected by the claims. They are for the sole purpose of making the claims easier to understand.

BRIEF DESCRIPTION OF THE FIGURES

Fig. 1

zeigt in einer räumlichen Ansicht eine Abisolierzange.

Fig. 2

zeigt die Abisolierzange gemäß Fig. 1 in einem Längsschnitt durch die Zangenkopfebene, wobei sich die Abisolierzange in dem Schneidhub befindet.

Fig. 3

zeigt die Abisolierzange gemäß Fig. 1 und 2 in einem Längsschnitt durch die Zangenkopfebene, wobei sich die Abisolierzange in dem Abziehhub befindet.

Fig. 4

zeigt in einer räumlichen Explosionsdarstellung einen Handhebel mit Feder- und/oder Dämpfungselement sowie Deckel für eine Vorratseinrichtung.

Fig. 5

zeigt in einer räumlichen Explosionsdarstellung einen Hebel mit Grundkörper, Lagerbolzen, Rolle und Fixierbolzen, womit eine Verstelleinrichtung zur Einstellung eines Spiels während des Schneidhubs gebildet ist.

Fig. 6 und 7

zeigen eine Abisolierzange in einem Längsschnitt durch die Zangenkopfebene, wobei die Verstelleinrichtung gemäß Fig. 5 in unterschiedlichen Betriebsstellungen dargestellt ist.

Fig. 8 und 9

zeigen in einem Längsschnitt durch die Zangenkopfebene eine Abisolierzange, bei welcher eine Verstelleinrichtung mit einem bewegbaren Feder- und/oder Dämpfungselement ausgebildet ist und die Verstelleinrichtung in unterschiedlichen Betriebsstellungen dargestellt ist.

Fig. 10

zeigt die Abisolierzange gemäß Fig. 8 und 9 in einer räumlichen Ansicht.

Fig. 11

zeigt einen beispielhaften Verlauf der Betätigungskraft an den Handhebeln einer Abisolierzange über den Schließhub der Handhebel.

In the following the invention will be further explained and described with reference to preferred embodiments shown in the figures.

Fig. 1

shows in a three-dimensional view a wire stripper.

Fig. 2

shows the wire stripper according to Fig. 1 in a longitudinal section through the pliers head plane, wherein the wire stripper is in the cutting stroke.

Fig. 3

shows the wire stripper according to Fig. 1 and 2 in a longitudinal section through the pliers head plane, wherein the wire stripper is in the Abziehhub.

Fig. 4

shows in a spatial exploded view of a hand lever with spring and / or damping element and cover for a storage device.

Fig. 5

shows in a three-dimensional exploded view a lever with base body, bearing pin, roller and fixing bolt, whereby an adjusting device for adjusting a game during the Schneidhubs is formed.

6 and 7

show a wire stripper in a longitudinal section through the pliers head plane, wherein the adjusting according to Fig. 5 is shown in different operating positions.

8 and 9

show in a longitudinal section through the pliers head plane a wire stripper, in which an adjusting device is formed with a movable spring and / or damping element and the adjusting device is shown in different operating positions.

Fig. 10

shows the wire stripper according to Fig. 8 and 9 in a spatial view.

Fig. 11

shows an exemplary course of the actuation force on the hand levers of a wire stripper on the closing stroke of the hand lever.

DESCRIPTION OF THE FIGURES

In the Fig. 1 to 3 a possible embodiment of a wire stripper 1 is shown. This has a fixed hand lever 2 and a movable hand lever 3. To bring about a closing stroke of the wire stripper 1, the movable hand lever 3 is pivoted by applying actuation forces by the user's hand in the direction of the fixed hand lever 2.

The fixed hand lever 2 is referred to as a "fixed hand lever", since this is rigid, here formed integrally with the arranged on the opposite side jaw 4. The fixed hand lever 2 and the jaw 4 are thus part of a base 6, on which other movable, during the operation of the wire stripper 1 moving parts are stored. Here, priority is given to the movement of the parts in the drawing plane according to Fig. 2 and 3 Which forms the pivoting plane of the hand levers 2, 3 and corresponds to a longitudinal sectional plane through the pliers head.

The movable hand lever 3 is mounted in a bearing 7, which is formed here with a bearing pin 8, pivotally mounted on the base body 6. The pivotable mounting of the movable jaw 5 via a bearing 9, which is also formed here with a bearing pin 10.

A forceps jaw 11 of the wire stripper 1 forms a receptacle 12 for a cable 13 to be stripped. In the forceps jaw 11 are located on both sides of the receptacle 12 stripping blades 14a, 14b, which are respectively held on blade holders 15a, 15b. In the stripping knives 14a, 14b facing away from the end portions of the knife holder 15a, 15b scissor-like pivoting about a bearing 16, which is here formed with a bearing pin 17, hinged to a pull rod 18. The knife holder 15a, 15b in this case form a V, which opens to form the receptacle 12 in the direction of the forceps jaw 11. During the cutting stroke is reduced with a closure of the hand lever 2, 3, the opening angle of the V, with which the stripping blades 14a, 14b to move towards each other and the stripping blades 14a, 14b can cut into an insulation of the cable 13. On the other hand, the movement of the stripping knives 14a, 14b, the knife holders 15a, 15b and the pull rod 18 in the direction of a longitudinal axis 19 of the receptacle 12 takes place during a tear-off stroke and a pull-off stroke and the cable 13 away from the forceps jaw 11. During this movement, the opening angle of the V of the blade holder 15a, 15b does not change or does not change substantially, the corresponding applies to the jaws 4, 5. In the following, the cutting stroke is also referred to as a pivoting stroke, during which a pivoting of the jaws 4, 5 and the knife holder 15a, 15b takes place with the stripping knives 14a, 14b with a change in the opening angle of the V. By contrast, the pull-down stroke and the pull-down stroke are also jointly designated as displacement stroke, during which the movement of the drawbar 18 with the knife holders 15a, 15b and stripping knives 14a, 14b takes place without significant pivoting thereof and without changing the opening angle V along the longitudinal axis 19.

The knife holders 15a, 15b and / or stripping knives 14a, 14b are externally supported on the associated jaw 4, 5 via a sliding contact 20a, 20b. During the pivoting stroke, actuating forces are transmitted from the forceps jaws 4, 5 to the blade holders 15a, 15b and / or stripping blades 14a, 14b via the sliding contact 20a, 20b without significant sliding movement in the area of the sliding contact 20. On the other hand, relative movement of the stripping blades 14a, 14b and the blade holders 15a, 15b in the area of the sliding contact 20 relative to the forceps jaws 4, 5 takes place during the displacement stroke.

For the production of the one part of the pivoting stroke and on the other hand, the subsequent subsequent to the swing stroke Verschiebehubs with a continuous pivoting movement of the hand lever The drive mechanism 21 is interposed on the one hand between the hand lever 2, 3 and the jaws 4, 5 to effect the pivoting stroke, and on the other hand between the hand lever 2, 3 and the pull rod 18 interposed to bring about the Verschiebehub.

The drive mechanism 21 has a lever 22, which is formed with a base body 54 and is designed as a pressure lever. For the illustrated embodiment, the base body 54 has a slight offset or curvature, without this necessarily being the case. The main body 54 is articulated in an end region in a bearing 23, which is here formed with a bearing pin 24, on the movable hand lever 3. In the other end region of the lever 22 has a in a bearing 25, here with a bearing pin 26, relative to the base body 54 rotatably mounted roller 27. The roller 27 forms a rolling contact with an actuating contour 28 of the movable jaw 5. During the cutting stroke, the contact of the roller 27 on the actuating contour 28 does not change, so that there is no rolling movement of the roller 27 with respect to the actuating contour 28. The actuating force applied to the hand levers 2, 3 by the user leads to a force in the lever 22 which leads to a first component which acts on the movable forceps jaw 5 in the region of the actuating contour 28 and is oriented circumferentially about the bearing 9, whereby a closing force on the movable jaw 5 is brought about. Any second component of the force in the lever 22, which is radially oriented to the bearing 9, does not exist during the cutting stroke or is supported by other measures described below so that it does not lead to the movement of the roller 27 along the actuating contour 28 ,

On the pull rod 18, a roller 31 is rotatably mounted in a bearing 30 formed here with a bearing pin 29. The pull rod 18 is mounted for movement coaxially or parallel to the longitudinal axis 19 displaceable relative to the base body 6. The pull rod 18 is in this case acted upon by a prestressed spring 32 in the direction of its displacement degree of freedom and in the direction of the forceps jaw 11, wherein the roller 31 is pressed by the spring 32 against the roller 27 of the lever 22. Due to the bias of the spring 32 and the biasing force exerted on the roller 27 of the lever 22, a rolling movement of the roller 27 with respect to the operating contour 28 during the cutting stroke is prevented. At the end of the cutting stroke but the force in the lever 22, the pull rod 18 with the roller 31 against the Pushing the spring 32 away from the forceps jaw 11, since the force brought about by the lever 22 in the contact between the rollers 27, 31 is greater than the biasing force generated by the spring 32. The exceeding of the biasing force of the spring 32 can be done on the one hand, since the force in the lever 22 with the closing movement of the hand lever 2, 3 is successively increased. But it is also possible that with the closing movement of the hand lever 2, 3 and the associated pivoting of the movable jaw 5, a pivoting of the actuating contour 28 takes place, whereby on the roller 27, an increasing deflection of the force in the lever 22 in the direction of the sliding degree of freedom the pull rod 18 takes place. With the onset of movement of the drawbar 18, the transition from the pivoting stroke to the displacement stroke, namely from the cutting stroke to the Abreißhub is brought about.

During the cutting stroke, the stripping blades 14a, 14b on opposite sides of the cable 13 have each cut a partial circumferential area of the insulation. During the first part of the Verschiebehubs, namely the Abreißhub, a tearing off during the cutting stroke partially separated sleeve-like portion 33 of the insulation takes place. With the complete tearing of the portion 33, the transition from the Abreißhub to the Abziehhub. Preferably, during the tear-off stroke, a movement of the stripping blades 14a, 14b or of the pull rod 18 in the direction of the longitudinal axis 19 takes place by 6.0 mm to 8.0 mm, in particular 6.5 mm to 7.5 mm.

The lever 22 has a further rotatable about a bearing 34, here with a bearing pin 35, relative to the base body 54 mounted roller 36. During the cutting stroke between the lever 22 and a spring and / or damping element 37, a game 68 is formed. With the transition from Abreißhub to Abziehhub the lateral surface of the roller 36 comes into contact with the held on the movable lever 3 spring and / or damping element 37. In this case, the loading of the spring and / or damping element 37 takes place by the roller 36 such that a further pivoting of the lever 22 about the bearing 23 relative to the hand lever 3, which is required for bringing about a further movement of the pull rod 18 away from the forceps jaw 11, with a higher loading of the spring and / or damping element 37 is connected. With this pivoting, the roller 36 can roll on a contact surface 38 of the spring and / or damping element 37. The spring and / or damping element 37 generates a moment on the lever 22, which in the direction of the forceps jaw 11 and opposite to the Movement of the drawbar 18 is oriented during the Abziehhubs. Thus, the spring and / or damping element 37 generates a force which has the effect of rapid closure of the hand lever 2, 3 during Abziehhubs due to the reduced forces between the stripping blades 14 a, 14 b and the portion 33, which is a sliding movement relative to the electrical conductor 39 executes, counteracts.

For the illustrated embodiment, the spring and / or damping element 37 is formed with an elastomer body 40, which, for example, in a rough approximation may have a block-like geometry.

According to Fig. 4 can the hand lever 3 on the hand lever 2 side facing a recess or receptacle 41 have, in which of the hand lever 2 side facing the spring and / or damping element 37 is used. Preferably, in the receptacle 41, the spring and / or damping element 37 is held so that it is fixed in the hand lever 3 except for a removal degree of freedom in the direction of the other hand lever 2, ie transversely to the longitudinal extension of the hand lever 3. In the direction of the force applied by the roller 36 on the spring and / or damping element 37 contact force, the spring and / or damping element 37 is supported on the hand lever free of play. A backup of the spring and / or damping element 37 in the assembled state in the aforementioned removal direction can be done by locking or any security devices.

For the illustrated embodiment, a storage device 42 is formed in the region of the hand lever 3, as in the European patent application with the official file number EP 14 177 831.6-1701 is disclosed. The storage device 42 has a lid 43 which closes the storage device 42 on the side facing the hand lever 2. The cover 43 is pivotally mounted on a base body of the hand lever 3 between an open position and a closed position (and vice versa), including the cover 43 has a bearing pin 44 which is insertable into a bearing eye 45 of a base body of the hand lever 22, for example. Under elastic Deformation of the body. For the illustrated embodiment, the cover 43 is multifunctional in that this serves in addition to the closure of the storage device 42 to secure the spring and / or damping element 37 in the receptacle 41 with respect to a removal. For this purpose, the spring and / or damping element 37 rests in the removal direction on the cover 43 in the region of the bearing pin 44, whereby the removal direction is blocked. Preferably, this has Spring and / or damping element 37 on the bearing pin 44 side facing via a semi-cylindrical, parallel to the bearing pin 44 oriented recess 46, against which abuts the end portion of the lid 43 with the bearing pin 44 to prevent the removal of the spring and / or damping element 37 , in view of the contour of the recess 46, a pivoting of the lid 43 between the opening and closing position of the same is made possible. It is also possible that the spring and / or damping element 37 is biased in the contact region of the recess 46 in the position of the cover 43 inserted into the main body of the hand lever 3.

Without this necessarily being the case, the lever 22 on both sides can each have a rotatably mounted roller 36a, 36b, which then during the Abziehhubs form a contact with the spring and / or damping element 37, whereby the surface pressure in contact with the spring and / or damping element 37 can be reduced.

• Mittels einer weiteren Feder 47 kann eine weitere Beeinflussung der Kraftverhältnisse an dem Hebel 22 erfolgen. Vorzugsweise beaufschlagt die Feder 47 während des Schneidhubs den Hebel 22 gegen die Betätigungskontur 28, so dass mittels der Feder 47 auch eine Auslegung des Übergangs von dem Schneidhub zu dem Abreißhub erfolgen kann.
• Möglich ist, dass die Betätigungskontur 28 mit einer Hinterschneidung 48 ausgebildet ist. Gelangt die Rolle 27 in den Bereich der Hinterschneidung 48, kann die Zangenbacke 5, verursacht durch eine Öffnungsfeder 49, automatisch trotz weiterer Schließung der Handhebel 2, 3 einen Öffnungshub ausführen.
• Eine Sicherungseinrichtung gemäß DE 20 2015 100 507.5 ist mit dem Bezugszeichen 50 gekennzeichnet.
• Des Weiteren ist die Abisolierzange 1 hier mit einer Trenneinrichtung 51, welche mit Schließung der Handhebel automatisch nach außen verschlossen oder abgedeckt werden kann, gemäß der europäischen Patentanmeldung mit dem amtlichen Aktenzeichen EP 1 153 683.6 ausgebildet.
• An den Messerhaltern 15a, 15b sind unter Bildung von Schneidelementen 52a, 52b gemäß der europäischen Patentanmeldung mit dem amtlichen Aktenzeichen EP 14 177 826.6 auswechselbar die Abisoliermesser 14a, 14b gehalten.

In the embodiment according to Fig. 1 to 4 The following optional optional components and features are shown:

• By means of a further spring 47, a further influencing of the force relationships on the lever 22 can take place. Preferably, the spring 47 acts on the lever 22 against the actuating contour 28 during the cutting stroke, so that by means of the spring 47, an interpretation of the transition from the cutting stroke to the Abreißhub can take place.
• It is possible that the actuating contour 28 is formed with an undercut 48. If the roller 27 in the region of the undercut 48, the jaw 5, caused by an opening spring 49, automatically perform despite further closure of the hand lever 2, 3 an opening stroke.
• A safety device according to DE 20 2015 100 507.5 is designated by the reference numeral 50.
• Furthermore, the wire stripper 1 here with a separator 51, which automatically closed or covered with the closing of the hand lever to the outside according to the European patent application with the official file number EP 1 153 683.6 educated.
• On the knife holders 15a, 15b are to form cutting elements 52a, 52b according to the European patent application with the official file number EP 14 177 826.6 replaceable stripping blades 14a, 14b held.

Should factory or by a user of the wire stripper 1, the transition from the Abreißhub to the Abziehhub, so the position during the closing stroke, in which the roller 36 comes after overcoming a game 68 for the first time in contact with the spring and damping element 37, be changeable, An adjusting device 53 can be used. For the in Fig. 5 illustrated embodiment, the position of the roller 36 relative to the base body 54 of the lever 22 can be changed via the adjusting device 53, whereby the distance of the roller 36 of the spring and / or damping element 37 in the starting position of the hand lever 2, 3 changes. For the in Fig. 5 illustrated embodiment, the base body 54 of the lever 22 has a bearing bore 55 and a fixing hole 56. The roller 36 has in this case a bearing bore 57 and a plurality of fixing holes 58a, 58b, which is distributed at a distance from the bearing bore 57 in the circumferential direction around the bearing bore 57 are, which corresponds to the distance of the fixing hole 56 of the bearing bore 55 of the base 54. In this case, the roller 36 is mounted on the main body 54 of the lever 22 by a bearing pin 59 which extends through the bearing bores 55, 57 with a press fit in this, and a fixing bolt 60, which is also to form a transition or Press fit through the fixing hole 56 and one of the fixing holes 58a, 58b extends. The bearing bore 57 is provided eccentrically on the roller 36. Depending on the choice of the fixing hole 58a, 58b changes in view of the eccentric arrangement of the bearing bore 57, the distance of the spring and / or damping element 37 facing, formed by the lateral surface of the roller 36 contact surface, whereby an adjustment of the position can take place in the closing stroke, with the achievement of which the roller 36 forms a contact with the spring and / or damping element 37 for the first time. In view of the attachment of the roller 36 both on the bearing pin 59 and on the fixing bolt 60, the roller 36 is not rotatable for this embodiment.

Quite possible, however, is that a rotatable attachment of the roller 36 takes place on the base body 54 via an eccentric pin, wherein an axial portion of the Eccentric pin is received in the bearing bore 57, while another, eccentric axial portion of the pin is rotatably received in the bearing bore 57. By rotation of the eccentric pin can then be done adjusting the transition from the Abreißhub to the Abziehhub. In this case, no fixing bolt 60 is used.

Preferably has the in Fig. 5 illustrated embodiment of the fixing bolt 60 via a handling element 61, in particular a conical thickening, via which a repositioning of the fixing bolt 60 from a fixing hole 58a in another fixing hole 58b can be brought about.

Fig. 6 and 7 show the adjustment 53 in different operating positions in which the fixing bolt 60 in different fixing holes 58a, 58b, ... is arranged. It can be seen here that the roller 36 protrudes differently far from the base body 54 of the lever 22 in the direction of the spring and / or damping element 37 for the different operating positions of the adjusting device 53.

The operation of the wire stripper 1 is as follows:
First, the cable 13 is inserted into the receptacle 12 of the wire stripper 1. Here, an adjustable stop 62 determines how far the cable 13 can be inserted into the receptacle 12. In this case, the stop 62 predefines the length of the portion 33 to be stripped in accordance with the distance of the stop 62 from the stripping blades 14a, 14b.

Following this, the hand lever 2, 3 are first actuated in an idle stroke until the cable 13 is clamped between clamping jaws 63a, 63b and the stripping blades 14a, 14b come into contact with the lateral surface of the insulation of the cable 13.

A further closure of the hand lever in a cutting stroke leads to the pivoting of the jaws 4, 5 towards each other. In the swivel stroke, the application of the hand lever 2, 3 causes the stripping blades 14a, 14b to be pressed against the cable 13 via the forceps jaws 4, 5, with the result that the insulation is cut. During the cutting stroke, the boundary conditions of the lever 22 are unchanged by the lever on the one hand in the bearing 23 is mounted and on the other hand rests without rolling movement with the roller 27 on the actuating contour 28.

With the transition from the cutting stroke to the Abreißhub the boundary conditions of the lever 22 change by the roller 27 rolls along the actuating contour 28, which is accompanied by an increasing pivoting of the lever 22 and the movement of the tie rod 18 with the roller 31 has the result. During the Abreißhubs the movement of the pull rod 18 takes place, without an interaction of the lever 22 with the spring and / or damping element 37 is present. At the end of the Abreißhubs and at the beginning of Abziehhubs then the roller 36 comes to rest on the spring and / or damping element 37, which additionally counteracts a spring and / or damping force of the spring and / or damping element 37 of the enlargement of Abziehhubs.

In Fig. 8 to 10 an alternative embodiment of the adjusting device 53 is shown. Here, the roller 36 rotates about a non-adjustable rotation axis on the base body 54 of the lever 22. In this case, the relative position of the spring and / or damping element 37 on the hand lever 3 can be changed by means of the adjusting device 53. Here, the receptacle 41 for the spring and / or damping element 37 is formed such that the spring and / or damping element 37 in the receptacle 41 has a limited degree of freedom in the direction of the longitudinal axis of the hand lever 3. The spring and / or damping element 37 has a transverse bore 64, while the hand lever 3 along its longitudinal extension several fixing holes 65a, 65b, ... has. In the different positions of the spring and / or damping element 37, this can be secured by means of a fixing bolt 66 with a handling element 67, in which the fixing bolt 66 is inserted through one of the fixing holes 65a, 65b and the transverse bore 64.

Fig. 11 shows the required operating force 69 that the user must apply to the hand lever 2, 3, over the closing pivot angle 70 of the hand lever 3 relative to the hand lever 2 during a closing stroke 71 which extends between the open position and the closed position of the hand lever 2, 3. During an idle stroke 72 without the stripping knives 14a, 14b generated counterforce closing the jaws 4, 5, until the end of the idle stroke 72, the stripping blades 14a, 14b have come to rest on the lateral surface of the cable 13. During the idle stroke 72, the operation of the hand lever 2, 3 with a small operating force 69 is sufficient, in which case as a result of the application of the spring 49, the operating force, for example, can increase linearly. In the subsequent cutting stroke 73, the cutting strips 14a, 14b are cut into the insulation of the cable 13. In this case, the required actuating force 69 increases with increasing closure of the hand lever 2, 3, since on the one hand a further application of the spring 49 takes place and on the other hand the cutting force on the Stripping blades 14a, 14b must be applied, which may increase as the entry of the stripping blades 14a, 14b into the insulation of the cable 13 increases. This is followed by the tear-off stroke 74, in which the actuating force 69 continues to rise, since the required movement of the pull rod 18 must take place against the application of the same by the spring 32. At the end of the tear-off stroke 74, the partial region 33 is completely torn off from the remaining part of the insulation of the cable 13. Dashed is in Fig. 11 the waste and further course of the actuating force 69 are shown, as this results without the use of the spring and / or damping element 37 according to the invention. Since with the tearing a required force for elastic and plastic deformation of the insulation in the connecting region between the portion 33 and the remaining portion of the insulation omitted, abruptly reduced for the non-inventive design abruptly the actuating force 69, then in the Abziehhub 75 only the sliding friction between the sub-region 33 and the electrical conductor of the cable 13 is overcome and any additional application of the spring 32 must be made. According to the invention takes place via the Abziehhub 75, the additional application of the spring and / or damping element 37, whereby the drop in the actuating force 69 is at least reduced, as with the illustrated operating force curve during the Abziehhubs 75 in Fig. 11 is shown.

It is understood that the in Fig. 11 shown course of the actuating force 69 is selected only by way of example. Thus, with a stripping pliers 1 according to the invention, other pitch values, curved courses (straight or curved part curves) and / or threshold values for the transition between the individual partial lifts can also be generated.

It is quite possible that the spring and / or damping element 37 still during the Abreißhubs 74 and slightly before (in particular with a swivel angle of the hand lever 2, 3 of a maximum of 8 °, 5 °, 3 ° or 2 ° ago) start of Abziehhubs 75th comes into operative connection with the lever 22. But it is also possible that this is done slightly (in particular with a swivel angle of the hand lever 2, 3 of a maximum of 8 °, 5 °, 3 ° or 2 ° after) start of the Abreißhubs 74.

For a different design of the stripping pliers 1 according to the invention, the spring and / or damping element 37 does not come exactly at the transition from the Abreißhub 74 Abziehhub 75 (for example, for an axial movement of the stripping 14a, 14b during the Abreißhubs of 6.5 mm to 7.5 mm) to the effect, but rather already for an axial path of the stripping blades 14a, 14b to a maximum of 3.0 mm, 2.0 mm or 1.0 mm before or after the transition from the Abreißhub 74 to Abziehhub 75th

For another interpretation in the context of the invention, the spring and / or damping element 37 is effective when the closing stroke 71 of the hand lever to 30% to 60%, in particular 40% to 50%, is passed.

For another embodiment, the spring and / or damping element 37 acts during tear-off stroke 74 or during the first 10% of the pull-down stroke.

1. a) für einen einzigen zulässigen Kabeldurchmesser,
2. b) für sämtliche Kabeldurchmesser bei mehreren bestimmungsgemäßen Kabeldurchmessern, die gemäß der Herstellerangabe mit der Abisolierzange 1 abisoliert werden können, oder
3. c) den größten von mehreren bestimmungsgemäßen Kabeldurchmessern

gelten.It is possible that the aforementioned information for which closed position of the hand lever 2, 3 and / or movement of the stripping blades 14a, 14b, the spring and / or damping element 37 to the effect

1. a) for a single permissible cable diameter,
2. b) for all cable diameters at several intended cable diameters, which can be stripped according to the manufacturer's instructions with the wire stripper 1, or
3. c) the largest of several intended cable diameters

be valid.

It is also possible that with several intended for the wire stripper 1 cable diameters, the relative position of the transition from Abreißhub 74 to Abziehhub 75 for at least one intended cable diameter before the closed position of the hand lever 2, 3, for which the spring and / or damping element 37th for the intended cable diameter comes into effect for the first time, while the relative position of the transition from Abreißhub 74 to Abziehhub 75 for at least one other intended cable diameter after the closed position of the hand lever 2, 3, for which the spring and / or damping element 37 for the further intended Cable diameter comes into effect for the first time. It is also possible that for several intended cable diameter optimization, the relative position of the transitions from Abreißhub 74 to Abziehhub 75 to the closed positions of the hand lever 2, 3, for which the spring and / or damping element 37 for the intended cable diameter for the first time to effect comes, is done.

For a different design of the stripping pliers according to the invention can be stripped with this, for example. As the largest cable, a cable with an outer diameter of 7.5 mm. In this case, for example, the spring and / or damping element effectively after 30% to 50% of the closing movement of the hand lever 2, 3. However, in the stripping of a cable with an outer diameter of 3.5 mm, the spring and / or damping element effective for 40% to 60% of the closing movement 71 of the hand lever 2, 3. For stripping a cable with an outer diameter of 1.3 mm, however, the spring and / or damping element is effective after 50% to 65% of the closing stroke of the lever 2 , 3.

Without being limited to this embodiment, for example, the closing stroke 71 of the hand lever 2, 3 in total over an angle of 30 to 40 °, preferably 34 to 38 °, take place.

For the embodiment according to Fig. 5 to 7 the roller 36 may also have a non-circular, cam-like lateral surface.

For the illustrated embodiment, the roller 36 between the bearings 23, 25, for example, approximately centrally mounted or fixed to the main body 54 of the lever 22.

• die Betätigungskinematik der Abisolierzange entsprechend DE 37 33 358 C1 ausgebildet sein,
• die Abisolierzange mit einem verstellbaren Anschlag zur Begrenzung des Abziehhubs gemäß EP 2 056 416 A2 ausgebildet sein,
• die Abisolierzange mit Handhebeln mit auswechselbaren Griffschalen für die Anpassung an unterschiedliche Größen der Hände des Benutzers gemäß EP 2 056 416 A2 ausgebildet sein,
• eine Ausbildung von Abisoliermessern entweder mit einer quer zur Längserstreckung der Aufnahme für das Kabel orientierten Klinge oder mit mehreren Lamellen gebildeten Messern zur Verbesserung der Anpassbarkeit der Schneidkontur an unterschiedliche Kabelgeometrien ausgestattet sein,
• im Bereich des Zangenmauls ein verschiebbarer Anschlag zwecks Gewährleistung einer einstellbaren Abisolierlänge vorhanden sein,
• die Abisolierzange über eine Trenneinrichtung verfügen, wobei diese auch mit einem Sperrhebel gemäß EP 2 056 416 A2 ausgestattet sein kann,
• die Abisolierzange über auswechselbare Messerkassetten verfügen, in welchen die Abisoliermesser gelagert sind (vgl. EP 2 081 266 A1 ),
• die Abisolierzange mit Auswerfern entsprechend EP 2 056 416 A2 ausgestattet sein,
• die Abisolierzange mit einer Vorratseinrichtung für die Bevorratung eines Zubehörteils gemäß der europäischen Patentanmeldung mit dem amtlichen Aktenzeichen EP 14 177 831.6-1701 ausgestattet sein,
• die Abisolierzange mit einer Sicherungseinrichtung ausgestattet sein, mittels welcher eine teilweise geschlossene Stellung oder eine vollständig geschlossene Stellung der Abisoliermesser sicherbar ist (vgl. DE 20 2015 100 507.5 ).

In principle, the invention can be used for a wire stripper 1, the basic structure for ensuring the stripping of the cable from the prior art is known, if the wire stripper has a cutting stroke, a Abreißhub and a Abziehhub. For example, for this purpose, a structure of the wire stripper, in particular with regard to the actuation kinematics and / or with respect to other functions, be designed according to the aforementioned prior art. To name but a few non-limiting examples, may

• the actuation kinematics of the wire stripper accordingly DE 37 33 358 C1 be educated
• the wire stripper with an adjustable stop to limit the Abziehhubs according to EP 2 056 416 A2 be educated
• the stripping pliers with hand levers with interchangeable handles for adapting to different sizes of the user's hands according to EP 2 056 416 A2 be educated
• an embodiment of stripping knives either with a blade oriented transversely to the longitudinal extension of the receptacle for the cable or knives formed with a plurality of fins to improve the adaptability of the cutting contour to different cable geometries,
• in the area of the forceps jaw there is a displaceable stop to ensure an adjustable stripping length,
• the wire stripper have a separator, which also with a locking lever according to EP 2 056 416 A2 can be equipped
• the stripping pliers have interchangeable cutter cartridges in which the stripping blades are mounted (cf. EP 2 081 266 A1 )
• the wire stripper with ejectors accordingly EP 2 056 416 A2 be equipped
• the wire stripper with a storage device for the storage of an accessory according to the European patent application with the official file number EP 14 177 831.6-1701 be equipped
• the wire stripper be equipped with a safety device by means of which a partially closed position or a fully closed position of the stripping knives can be secured (see. DE 20 2015 100 507.5 ).

LIST OF REFERENCE NUMBERS

1

Abisolierzange

2

solid hand lever

3

movable hand lever

4

firm jaw

5

movable pliers jaw

6

body

7

Bearing (movable hand lever)

8th

Bearing pin (movable hand lever)

9

Bearing (movable jaw)

10

Bearing pin (movable jaw)

11

beaks

12

admission

13

electric wire

14

Stripping knife

15

knife holder

16

Bearing (knife holder)

17

Bearing pin (knife holder)

18

pull bar

19

longitudinal axis

20

sliding contact

21

drive mechanism

22

lever

23

Bearing (movable lever - lever)

24

Bearing pin (movable lever - lever)

25

Bearing (role of the lever)

26

Bearing pin (role of the lever)

27

role

28

actuating contour

29

Bearing pin (roller on the drawbar)

30

Bearing (roller at the drawbar)

31

Roll (drawbar)

32

Spring (drawbar)

33

Part of the insulation

34

Bearing (central role)

35

Bearing pin (middle roll)

36

Roller (for contact with spring and / or damping element)

37

Spring and / or damping element

38

Contact surface (spring and / or damping element)

39

electrical conductor

40

elastomer body

41

admission

42

stocker

43

cover

44

Journal (of the cover)

45

bearing eye

46

Recess (spring and / or damping element)

47

feather

48

undercut

49

opening spring

50

safety device

51

separator

52

cutting element

53

adjustment

54

body

55

bearing bore

56

locating pin

57

bearing bore

58

locating pin

59

bearing bolt

60

Bolt Fixing

61

handling element

62

attack

63

jaw

64

cross hole

65

locating pin

66

fixed bolts

67

handling element

68

game

69

operating force

70

swivel angle

71

Closing

72

idle stroke

73

cutting stroke

74

Abreißhub

75

withdrawal stroke

Claims (12)

1. Stripping pliers (1) comprising two hand levers (2, 3), a closing stroke of the stripping pliers (1) comprising

   a) a cutting stroke (73) during which a closing movement of at least one cutting blade (14a, 14b) directed transverse to a longitudinal axis (19) of an accommodation (12) for a cable (13) to be stripped into a closed position takes place, in the closed position an insulation of a cable (13) arranged in the accommodation (12) being partially cut so that a sleeve-like portion (33) of the insulation is partially separated,

   b) a break-away stroke (74) during which the at least one cutting blade (14a, 14b) is moved in the direction of the longitudinal axis (19) of the accommodation (12) for the cable (13) to be stripped until the sleeve-like portion (33) has broken away, and

   c) a stripping stroke (75) during which the at least one cutting blade (14a, 14b) is moved in the direction of the longitudinal axis (19) of the accommodation (12) for the cable (13) to be stripped such that the previously broken away sleeve-like portion (33) is slidingly moved along an electrical conductor (39) of the cable (13),

   d) a spring element and/or damping element (37) being provided which comes into effect approximately at the transition from the brake-away stroke (74) to the stripping stroke (75) such that the spring element and/or damping element (37)

   da) does not influence the force conditions at the stripping pliers (1) during the cutting stroke (73) and the brake-away stroke (74) and

   db) produces a spring force and/or damping force counteracting a closure of the hand levers (2, 3) during the stripping stroke (75),

   e) a drive mechanism (21) comprising a lever (22), the mechanical boundary conditions of the lever (22) changing at the transition from the cutting stroke (73) to the brake-away stroke (74) and

   f) the lever (22) biasing the spring element and/or damping element (37) during the stripping stroke (75),

   characterised in that

   g) the lever (22) is arranged with a play (68) to the spring element and /or damping element (37) during the cutting stroke (73) and the brake-away stroke (74), the play (68) being removed at the transition from the brake-away stroke (74) to the stripping stroke (75),

   h) the spring element and/or damping element (37) being held at the movable hand lever (3).
2. Stripping pliers (1) of claim 1, characterised in that the lever (22) comprises a roller (36) which starts to interact with the spring element and/or damping element (37) at the transition from the brake-away stroke (74) to the stripping stroke (75).
3. Stripping pliers (1) of claim 2, characterised in that the lever (22) comprises a roller (36a, 36b) on each side, the rollers (36a, 36b) having a common rotational axis and each starting to interact with the spring element and/or damping element (37) at the transition from the brake-away stroke (74) to the stripping stroke (75).
4. Stripping pliers (1) of one of claims 1 to 3, characterised in that the play (68) between the spring element and/or damping element (37) and the lever (22) is adjustable.
5. Stripping pliers (1) of claim 4 when referring back to claim 2 or 3, characterised in that the play (68) between the spring element and/or damping element (37) and the lever (22) can be changed by a change of the position of the rotational axis of the at least one roller (36) of the lever (22).
6. Stripping pliers (1) of claim 4 when referring back to claim 2 or 3, characterised in that the play (68) between the spring element and/or damping element (37) and the lever (22) can be changed by an eccentric rotation of the roller (36) of the lever (22) and fixation of the roller (36) against rotation at the lever (22).
7. Stripping pliers (1) of claim 4, characterised in that the play (68) between the spring element and/or damping element (37) and the lever (22) can be changed by a change of the position of the spring element and/or damping element (37).
8. Stripping pliers (1) of one of the preceding claims, characterised in that the spring element and/or damping element (37) is embodied as or comprises an elastomeric body (40).
9. Stripping pliers (1) of one of the preceding claims, characterised in that the spring element and/or damping element (37)

   a) is inserted into a hand lever (3) and

   b) secured in the hand lever (3) by assembling a lid (43) of a storage device (42) realized in the region of the hand lever (3) und designated for storing at least one accessory part.
10. Stripping pliers (1) of one of the preceding claims, characterised in that by the hand levers (2, 3) also a severing device (51) for severing a cable (13) can be actuated, the spring element and/or damping element (37) becoming effective in a last stroke part for severing the cable (13) by the severing device (51).
11. Stripping pliers (1) of one of the preceding claims, characterised in that the spring element and/or damping element (37) comes into effect during the stripping of a cable (13) having an outer diameter of

    a) 7.5 mm after 30% to 50% of the closing stroke (71) of the hand levers (2, 3),

    b) 3.5 mm after 40% to 60% of the closing stroke (71) of the hand levers (2, 3) and/or

    c) 1.3 mm after 50% to 65% of the closing stroke (71) of the hand levers (2, 3).
12. Stripping pliers (1) of one of the preceding claims, characterised in that in the case that the stripping pliers (1) are designated for a plurality of cable diameters, for at least one intended cable diameter the relative position of the transition from the brake-away stroke (74) to the stripping stroke (75) for which the spring element and/or damping element (37) for the first time becomes effective is positioned in front of the closed position of the hand levers (2, 3), whereas for at least one other intended cable diameter the relative position of the transition from the brake-away stroke (74) to the stripping stroke (75) for which the spring element and/or damping element (37) for the first time comes into effect is positioned behind the closed position of the hand levers (2, 3).

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